Epson EMP-7300, Руководство по обслуживанию

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2-22
REV.A
2.11 CD10RC BOARD (RECEPTOR BOARD)
This is the board with the infrared signal detection component. There are two receptor
boards equipped in this device, one is attached to the speaker bracket on front face
(Front), another is on the rear case (Rear). You can control this device through the
boards on both sides. There are used same boards.
The figure 2-32 to2-33 shows the receptor boards and their circuits.
Figure2- 32
Figure2- 33
Each receptor board is connected to CN 900(Front)/901(Rear) on the CD10MA board,
its output signal (serial data) is connected to I/F control CPU after wired OR is applied
on CD10MA board.
1. The CD10MA board performs the power ON/OFF operation and the starting up
menus, utilizing the serial data received from the remote controller (button switches
and pointers).
2. The serial signal send to the CD10DR board via the CD10MA board performs the
display control (Freeze / Blank).
3. The serial signal send to the CD10VJ board via the CD10MA board performs the
mute control and the audio volume control.
The figure 2-26 shows remote control circuit block.
IC300
GP1U102X
CN300
S38-PH-K
R300
47
GND VCC 1 2 1 4
GND VOUT
1 1
2
3
0.1
µ
100
µ
2 2
1
CHIP
3 3
2
IRD
+5V
GND
GND